Wages and hours in the manufacture of airplanes and aircraft engines, 1929. - Washington, U.S. Govt. print. off., 1930. - iii, 53 p. incl. tables. 23 cm. LCCN: l 31000001 Subjects--Topical Terms: Wages--Aircraft industry--United States.Hours of labor--United States. LC Class. No.: HD8051 / .A62 no. 523